Exhaust-valve.



. to allow ready access to the interior part, A and consists of the cap 7 which is screw' No. s95,o13.

and the invention has for its objects; to ro- 'connected with a sort of a 'UNITED STATES PATENT OFFICE. L

FRANK HYDE (.HISHOLM, OF CHICAGO, ILLINOIS.

Specification of Application tiled August 6, 1906. Seriali- 1%.- 329,301..

To all whom 'it may concern:

Be itknown that I, FRAXK Hips Culs- HoLM, a. citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Exhaust-Valves, of which the following is a specification.

My invention relates to exhaust valves for radiators, high pressure drip traps, andother similar devices, in which 1t is desirable to allow the water and air to drain out of the system, but to revent the passage of steam,

vide an improved valve of this type in w rich the float for controlling the jwater valve is protected .from the sudden imush of steam or water; to provide a valve in which air may` be admitted and vented independently ofthe Water, and in which the water collected in the casing will never interfere with the admission of air thereto or the venting of air therefrom; to provide a balanced and rapidly operating water exhaust valve arrangement, and finally, to provide a compact and simple valve which shall be effective and reliable in operation. These and other object-s are accomplished by my invention, one embodiment of which is illustrated in the accompanying drawings in which- Figure 1 is a transversesection through the valve;

Figure 2 is a. plan view with the cap rcmoved,

Figure 3 is a detail section illustrating the air exhaust valvethe thermostatic closing means being omitted, and

Figure 4 is a vlongitudinal section through the air valve at right angles to the section of Figure 3. i

As illustrated in the drawings, 4 is the valve easing provided at 5 Wit-h an admission connection leading from the radiator, and at 6 with a connection wit-h the vacuum return, a drain, or the atmos here. The top of the casingr is removable fifom the body thereof,

threaded into the body portion of the valve. The vacuum return or exhaust opening 6 is ocket 7 on the interior of the easing, whicl pocket is provided With a pair of valve openings S and 9 for the passa-ge of Wat-er to the vacuum return, a drain, or the atmo'shere, and'withl the assage 10 leadingto t e casing 11 in located. Referring first to the water exhaust valve, such valve comprises, as indicated in Figures 1 and 2, apair of valves 12 and`13 carried by the valve stem 14, which valve' ste1n-is pivotally connected to the lever l'pivoted at 16 to the projecting stud .17, and provided at its outer end with the lloat 18 which may be of any )referred form and is adapted to keep the va ves closed by its weight When the casing. is 'ein fty, and

open such valves l2 and 13 when t 1e Water in the casing reaches a certain predetermined height. The air exhaust valve 19 is inclosed in the casing 11 leading to the opening 10,'previously referred to, and such valve comprises a plug 19 of expansible material such as carbon, secured in the easing and having a reduced upper end 20 fitting a correspondingly reduced. opening in the head 21 of the casing, which is screw-threaded to the portion 11. This valve is of the usual construction, and is so arranged that when air is passing through adjacent the valve, such valve Will be of such a. temperature as to bc contracted and allow air to pass through the passage and-out through the ocket 7- and outlet opening 6, but when tie casing is filled with steam the valve 19 will ex and, closing the opening in the head 21 ant' preventing any further egress of the steam. Located adjacent to the admission o ening 5 is the baille plate 21, which baflic p ate extends downwardly toward the bottom of the" casing and is provided at its upper end with an air port 22.- The purpose of this baille plate 21 is to prevent a sudden inrush of the water or steam from the admission opening impacting against the lioat 18, and the air port 22 at the upper end of such baille plate 21 serves to admit air to the casing after the I water in the casing has risen above the level of the pressure on the top valve 12 is counterbalanced by that on the lower valve 13, and the valve is not only more easily worked,

but provides .for a more rapid exhaustof theY Whic the thermostatic` air exhaust valve is Water than would lbe the case if onlv a single sfo ros

valve opening were provided. The part 23 is e .needle valve whereby the casing may' be blown out and cleaned from' time'to time.

In Figure 3 a detail modification of a different form of air exhaust valve is shown. In this modification, the expensble plug'is omitted, thereby providing a continuous opening vthrough the head 21. This nr rangement of course, permits of a constant leakage of steam, but the amount is so smell as to be of slight import-ance. Having thus described my inventiona and illustrated its usefwhet I claim es new and desire to secureby Letters Patent, is the followinga l Y In combination; a. casing provided with admission and exhaust openings, o. pocket connected with the exhaust opening and eax- 4 therewith and wit and a. thermost-atic valve in the air tube for tending into the casing and having valve openings in the o posite faces, a. valve stem 5,0 provided with va ves fitting such openings, one valve being on the outside of the pocket and the other on the inside thereof, a float for actuating the valve stem, on air tube mounted upon thelpocket and communicating 25 the interior of the casing,

controlling the passage therethrough.

In testimony whereof I have hereunto CHARLES Gamm' JAMES H. HANNA.

signed my name in the presence of the two 30 

